If when you hit start it goes automatically full speed and won't stop, it's the optical speed sensor. Not the optical platter sensor, but the speed sensor. It is located behind the round cover on the motor. You have to open up the bottom to see it. You do not need to remove the motor assembly. There is an encoder ring that runs thru the sensor. Replace the Sensor ( Sharp A135R) and you are good to go. You may want to change the resistors as well. But necessary if the look fine.
I believe it's the Speed sensor inside the motor drive case. The Part number on my sesor is Sharp 1A35R. It's a sensor that tracks the platter speed. If I replace the whole motor PCB with a good one then the turntable works just fine. I ordered a couple 1A35R from Ebay and hopefully that will solve the problem.
Answers & Comments
If when you hit start it goes automatically full speed and won't stop, it's the optical speed sensor. Not the optical platter sensor, but the speed sensor. It is located behind the round cover on the motor. You have to open up the bottom to see it. You do not need to remove the motor assembly. There is an encoder ring that runs thru the sensor. Replace the Sensor ( Sharp A135R) and you are good to go. You may want to change the resistors as well. But necessary if the look fine.
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I believe it's the Speed sensor inside the motor drive case. The Part number on my sesor is Sharp 1A35R. It's a sensor that tracks the platter speed. If I replace the whole motor PCB with a good one then the turntable works just fine. I ordered a couple 1A35R from Ebay and hopefully that will solve the problem.